Structure and fixing member for mounting fuel injection valve

Abstract

In a mounting structure for mounting an injector to an internal combustion engine, a fixing member is inserted into a hole of a cylinder head in an axial direction. Thus, the injector is fixed between the fixing member and the cylinder head. A connector portion of the fixing member is inserted into the hole of the cylinder head together with the fixing member. Therefore, the connector portion of the fixing member can be easily connected with a connector portion of the injector even if the hole of the cylinder head is deep. A first socket provided on an end of the connector portion of the fixing member opposite from the injector is disposed outside the cylinder head. Therefore, the injector can be easily connected with a power source.

1. A mounting structure for mounting a fuel injection valve, which is formed with an injection hole in an end thereof and injects fuel through the injection hole, into a hole provided by a cylinder head of an internal combustion engine, the mounting structure comprising:
 a fixing member formed with a fuel passage inside for supplying the fuel to the fuel injection valve, wherein the fixing member is accommodated in the hole at least partially and presses the fuel injection valve against the cylinder head in an axial direction; 
 a first connector, which protrudes radially outward from the fuel injection valve and is electrically connected with an electromagnetic drive portion of the fuel injection valve; and 
 a second connector disposed radially outside the fixing member, wherein an end of the second connector is electrically connected with the first connector and the other end of the second connector is disposed outside the cylinder head. 
 
   
   
     2. The mounting structure as in  claim 1 , wherein
 the first connector is connected with the second connector by fitting the first connector with the second connector in the axial direction. 
 
   
   
     3. The mounting structure as in  claim 1 , wherein
 the fixing member has a small diameter portion, of which an external diameter is smaller than that of the other portion of the fixing member, and 
 the second connector is fixed to the small diameter portion by a resin molding. 
 
   
   
     4. The mounting structure as in  claim 1 , further comprising:
 a holding member fitted to a groove, which is formed on a circumference of an outer wall of the fixing member and is caved radially inward, for holding the second connector to the fixing member. 
 
   
   
     5. The mounting structure as in  claim 1 , wherein
 the mounting structure is formed so that the fixing member and the second connector are formed by a resin in a single piece. 
 
   
   
     6. The mounting structure as in  claim 1 , wherein
 the fixing member is formed integrally with a pipe member, which supplies the fuel to the fuel injection valve. 
 
   
   
     7. The mounting structure as in  claim 1 , wherein
 the second connector has a first terminal electrically connected with an exterior power source and a second terminal connected with the first connector, and 
 the second connector is formed so that the first terminal and the second terminal are disposed separately from each other in the axial direction. 
 
   
   
     8. The mounting structure as in  claim 1 , wherein
 the second connector extends along the axial direction. 
 
   
   
     9. The mounting structure as in  claim 8 , wherein
 the first connector is connected with the second connector by fitting the first connector with the second connector in the axial direction. 
 
   
   
     10. A fixing member for pressing a fuel injection valve, which is accommodated in a hole penetrating a cylinder head, against the cylinder head in an axial direction, the fixing member comprising:
 a cylinder portion providing a fuel passage inside for supplying fuel to the fuel injection valve; 
 an opening portion formed in the cylinder portion, wherein a first connector, which protrudes radially outward from the fuel injection valve and is electrically connected with an electromagnetic drive portion of the fuel injection valve, penetrates the opening portion; and 
 a second connector disposed radially outside the fuel passage, wherein the second connector can be electrically connected with the first connector. 
 
   
   
     11. The fixing member as in  claim 10 , wherein
 the first connector is connected with the second connector by fitting the first connector with the second connector in the axial direction. 
 
   
   
     12. The fixing member as in  claim 10 , wherein
 the cylinder portion has a small diameter portion formed on a circumference of an outer wall of the cylinder portion, and 
 the second connector is fixed to the small diameter portion by a resin molding. 
 
   
   
     13. The fixing member as in  claim 10 , further comprising:
 a holding member fitted to a groove, which is formed on a circumference of an outer wall of the cylinder portion and is caved radially inward, for holding the second connector to the cylinder portion. 
 
   
   
     14. The fixing member as in  claim 10 , wherein
 the fixing member is formed so that the cylinder portion and the second connector are formed by a resin in a single piece. 
 
   
   
     15. The fixing member as in  claim 10 , wherein
 the fixing member is formed integrally with a pipe member, which supplies the fuel to the fuel injection valve. 
 
   
   
     16. The fixing member as in  claim 10 , wherein
 the second connector includes a first terminal connected with an exterior power source and a second terminal connected with the first connector, and 
 the second connector is formed so that the first terminal and the second terminal are disposed separately from each other in the axial direction. 
 
   
   
     17. The fixing member as in  claim 10 , wherein
 the second connector extends along the axial direction. 
 
   
   
     18. The fixing member as in  claim 17 , wherein
 the first connector is connected with the second connector by fitting the first connector with the second connector in the axial direction.